我谁逗比却不傻
[wŏ shéi dòu bĭ què bù shă]
Means 'I'm silly/foolish yet I'm not really'. Someone might adopt this as their screen name as self-deprecation or irony when they see themselves acting goofy or absurdly at times but know clearly enough that such behaviors are merely a part of their true persona - showing humility while also embracing quirks.